A wise old hobo saying: "Keep your knife in your pocket and your money in your shoes."
Trying to intimidate somebody with a knife is a bad idea. Once you show a weapon, you had best be intent upon using it, because the other guy is going to believe his life is in danger. My rule of thumb is to make EVERY EFFORT to leave the scene of a conflict without any violence, but if a man [i:b6d3298c50]makes[/i:b6d3298c50] me fight him, then he is going to get what's coming to him, and I intend to do my best to put him in the hospital at the very least.
I am not by nature a violent person. I think the best possible course of action is to avoid any and all situations in which you might wind up in a fight. However, if you do wind up in a fight, do whatever is necessary to make sure that you win. THERE IS NO SUCH THING AS A FAIR FIGHT. Fighting is combat, and combat is for keeps. Anybody who values his life had better leave me alone.